CN112909584B - Antenna device - Google Patents

Abstract

The present invention proposes an antenna device, which includes a circuit board, an electronic component, a functional component module, an antenna module and a feeder. The electronic component is arranged on the circuit board and includes a microprocessor and a wireless communication chip; the functional component module includes a carrier board and a metal component arranged on the carrier board; the antenna module has a feeding point, a grounding point and a radiator, the feeding point and the grounding point are both arranged on the carrier board and are electrically connected to the two sides of the metal component respectively, the grounding point is also electrically connected to the grounding layer of the circuit board, and the radiator includes at least a part of the metal component; the feeder is used to transmit wireless signals to the feeding point and feed into the radiator. In this way, the metal component of the functional component module can be used as a radiator to save the accommodation space of the radiator.

Description

Antenna device

This application is a divisional application of Chinese application No. 201610114292.0, filed on March 1, 2016, and entitled “ANTENNA DEVICE”.

[Technical field]

The present invention relates to an antenna device, and more particularly to an antenna device integrating an antenna module and a functional element module.

【Background technique】

Wireless communication technology is currently widely used in various electronic products. For smart phones or tablet computers, the frequencies of the wireless signals they use are more (or the frequency bands they cover are more), so correspondingly such electronic products require more antennas to send and receive various wireless signals.

However, when there are more antennas, it will be more difficult to distribute the antennas in the electronic product. In other words, it will be more difficult to determine where to place the antennas in the electronic product to achieve better efficiency and how to avoid occupying the space for other electronic components/modules. When the size of the electronic product is smaller, these problems will become more complicated.

Therefore, how to design and install an antenna that meets the required wireless communication frequency in the limited and complex available space in an electronic product is a problem to be solved in the industry.

[Summary of the invention]

An object of the present invention is to provide an antenna device which can integrate an antenna module and a functional element module to save the space occupied by the antenna module.

An object of the present invention is to provide another antenna device, which can provide at least two resonance modes so that the antenna device can operate in multiple frequency bands.

To achieve the above-mentioned purpose, the antenna device disclosed in the present invention includes: a circuit board including a ground layer; a plurality of electronic components arranged on the circuit board and including a microprocessor and a wireless communication chip; a functional element module including a carrier and a metal component arranged on the carrier, the carrier having a main body and an extension portion, a side surface of the main body being spaced apart from and facing a side surface of the circuit board, and the extension portion extending from the side surface of the main body and connecting to the side surface of the circuit board; a first antenna module having a feeding point, a first grounding point and a first radiator, the feeding point being arranged on the main body and electrically connected to one side of the metal component, the first grounding point being arranged on the extension portion and electrically connected to the other side of the metal component and electrically connected to the ground layer, the first radiator including at least a portion of the metal component; and a feed line, one end of which is electrically connected to the feeding point and the other end of which is electrically connected to the wireless communication chip, for transmitting a first wireless signal to the feeding point and feeding into the first radiator.

To achieve the above-mentioned purpose, another antenna device disclosed in the present invention comprises a circuit board, which comprises a grounding layer; a plurality of electronic components, which are arranged on the circuit board and include a microprocessor, a wireless communication chip and a memory; a functional element module, which comprises a carrier and a metal component arranged on the carrier, the carrier having a main body and an extension, a side surface of the main body is spaced apart from and faces a side surface of the circuit board, and the extension extends from the side surface of the main body and connects to the side surface of the circuit board; a first antenna module, which has a first grounding point and a first radiator, the first grounding point is arranged on the extension and is electrically connected to the first radiator. A first radiator is connected to one side of the metal component and electrically connected to the ground layer, and the first radiator includes at least a portion of the metal component; a second antenna module is arranged above the carrier and has a feeding point, a second radiator and a second grounding point, the feeding point is arranged at one end of the second radiator, the second grounding point is arranged at the other end of the second radiator and electrically connected to the ground layer; and a feed line, one end of which is electrically connected to the feeding point and the other end is electrically connected to the circuit board, for transmitting a first wireless signal to the feeding point and coupling to the first radiator, and for transmitting a second wireless signal to the feeding point and feeding into the second radiator.

Thus, the antenna device has at least the following beneficial technical effects: the first antenna module is integrated with the functional element module, so that the functional element module can serve as the radiator of the first antenna module, thereby saving or eliminating the space required to accommodate the radiator; in addition, the first antenna module and the second antenna module can be coupled to generate another resonance mode, so that the antenna device can provide at least two resonance modes.

In order to make the above-mentioned objectives, technical features and advantages more obvious and understandable, the following is a detailed description of preferred embodiments in conjunction with the accompanying drawings.

【Brief Description of the Drawings】

FIG. 1A is a top view of an antenna device according to a first preferred embodiment of the present invention.

FIG. 1B is a partially enlarged detailed view of FIG. 1A .

FIG. 1C is another partially enlarged detailed view of FIG. 1A (the radiation path is not shown).

FIG. 2 is a side view of an antenna device according to a first preferred embodiment of the present invention.

FIG. 3A is a top view of an antenna device according to a second preferred embodiment of the present invention.

FIG. 3B is a partially enlarged detailed view of FIG. 3A .

FIG. 4 is a side view of an antenna device according to a second preferred embodiment of the present invention.

FIG. 5 is another side view of the antenna device according to the second preferred embodiment of the present invention.

FIG. 6A is a top view of an antenna device according to a third preferred embodiment of the present invention.

FIG. 6B is a partially enlarged detailed view of FIG. 6A .

FIG. 7 is a side view of an antenna device according to a third preferred embodiment of the present invention.

FIG. 8 is a schematic diagram showing the relationship between frequency and voltage standing wave ratio of the antenna device according to the second and third preferred embodiments of the present invention.

【Symbol Description】

1, 2, 3 Antenna Devices

10 Circuit Board

101 Side

11. Ground plane

20 Electronic components

21 Microprocessor

22 Wireless communication chip

23 Memory

30 Functional Component Modules

31 Carrier board

311 Main body

3111 Side

312 Extension

32 Metal components

40 first antenna module

41 Feed point

42 First grounding point

43 The First Radiator

L1 Radiation Path

W Pitch

50 Feeder

60 Second antenna module

61 Second Radiator

62 Second grounding point

63 Connectors

64 Feed Points

L2 Radiation Path

H Spacing

70 Cover

71 Metal Parts

72 Insulation

73 Bottom

【Detailed ways】

Please refer to FIG. 1A, FIG. 1B and FIG. 2, which are top and side views of an antenna device according to a first preferred embodiment of the present invention. The antenna device 1 may be a part of an electronic product with wireless communication function (such as a smart phone or a tablet computer, etc.), and the antenna device 1 may include a circuit board 10, a plurality of electronic components 20, a functional component module 30, a first antenna module 40 and a feeder 50. The technical contents of the plurality of components will be described in sequence as follows.

The circuit board 10 is the main circuit board in the electronic product, which can be used for most and main electronic components 20 to be set or connected thereon, and some mechanical components (not shown) can also be set on the circuit board 10. In terms of appearance, the circuit board 10 is illustrated as a rectangle, but the shape in actual application is not limited to this, and it can also be an irregular shape. Structurally, the circuit board 10 includes a circuit pattern layer (not shown) so that the electronic components 20 can be directly or indirectly electrically connected to each other to transmit electrical signals to each other. The circuit board 10 further includes one or more grounding layers 11, which can be the outer layer or inner layer of the circuit board 10 (that is, not exposed); the grounding layer 11 can be a metal layer, such as a copper layer.

The electronic component 20 can be disposed on the circuit board 10, for example, by solder or an electrical connector (not shown), and the electronic component 20 is electrically connected to the circuit pattern layer and the ground layer 11 of the circuit board 10. The electronic component 20 can include a microprocessor 21 and a wireless communication chip 22, etc. The microprocessor 21 (or microcontroller or central processing unit, used to perform data calculations, etc.) and the wireless communication chip 22 (used to send and receive and/or process wireless signals, which can be equivalent to a receiver/transmitter or transceiver, or a chipset) are both common electronic components in general electronic products with communication functions, so the specific implementation method should be easily understood by those with ordinary knowledge in the technical field; in addition, the microprocessor 21 and the wireless communication chip 22 may also be integrated into a single component and disposed on the circuit board 10.

According to actual application or demand, the electronic component 20 may also include a memory 23, a battery, a liquid crystal screen, various sensors and/or a signal processing chip (not shown) to provide various functions of the electronic product. Therefore, the circuit board 10 carrying the multiple electronic components 20 may also be called a motherboard.

Similar to the electronic components 20 on the circuit board 10, the functional component module 30 is also used to provide the functions of the electronic product. According to the actual application or demand, the functional component module 30 may include an earphone module, a camera module, a speaker module, a vibration module or a connector module, which are commonly used in electronic products. Since the earphone module, the speaker module, the connector module, etc. can all be used to output signals, such functional component modules 30 may also be called output component modules. The earphone module will be taken as an example for further explanation.

Structurally, the functional element module 30 may include a carrier board 31 and a metal component 32, or may include a non-metal component (e.g., a plastic structure around the earphone jack). The carrier board 31 has a main body 311 and an extension 312. The main body 311 is not directly in contact with or combined with the circuit board 10, but a side surface 3111 thereof is spaced apart from and faces a side surface 101 of the circuit board 10; in other words, a spacing W is defined between the side surface 3111 of the main body 311 and the side surface 101 of the circuit board 10. In terms of size, the carrier board 31 may be much smaller than the circuit board 10, so the carrier board 31 may also be called a small board. The carrier board 31 may also be a flexible circuit board.

The extension portion 312 extends from the side 3111 of the main body portion 311 (as shown in FIG. 1C , the boundary between the main body portion 311 and the extension portion 312 can be indicated by an imaginary dotted line), and then further contacts and connects to the side 101 of the circuit board 10. Therefore, the extension portion 312 and the main body portion 311 can be integrally formed, and the extension portion 312 is fixed on the side 101 of the circuit board 10. The extension portion 312 can also be integrally formed with the circuit board 10, so that the extension portion 312 and the main body portion 311 can be considered to extend from the side 101 of the circuit board 10.

The metal component 32 is disposed on the carrier 31, and generally refers to a structure including a metal conductor on the carrier 31, and can be distributed on the main body 311 and the extension 312. The metal component 32 can include, for example, a metal shell, a metal pin, a metal sheet, a metal circuit, a resistor, a capacitor, or an inductor, and the present embodiment takes the metal sheet located at the bottom of the carrier 31 as an example.

It is also explained that there is an electrical connection between the functional element module 30 and the circuit board 10, so that electrical signals can be transmitted between the functional element module 30 and the circuit board 10. The electrical signal can be transmitted to the circuit board 10 through the extension portion 312, so the functional element module 30 can include contacts, transmission lines or electrical connectors (not shown) on the extension portion 312 for electrical connection with the circuit board 10; the multiple contacts, transmission lines or electrical connectors can also be regarded as possible metal components 32.

The first antenna module 40 is used to transmit and receive electromagnetic waves with a specific frequency (frequency band), and has a feeding point 41, a first grounding point 42, and a first radiator 43. The feeding point 41 is disposed on the main body 311 of the carrier 31, and is preferably located on the side 3111 of the main body 311 and close to a corner of the main body 311; the feeding point 41 is also electrically connected to one side of the metal component 32.

The first grounding point 42 is disposed on the extension portion 312 of the carrier 31, and is preferably close to the connection between the extension portion 312 and the circuit board 10; the first grounding point 42 is also electrically connected to the other side of the metal component 32. In other words, the first grounding point 42 and the feeding point 41 are respectively located on both sides of the metal component 32. The first grounding point 42 is further electrically connected to the grounding layer 11 of the circuit board 10, for example, through a contact on the extension portion 312, a transmission line or an electrical connector to connect to the grounding layer 11.

The first radiator 43 includes at least a portion or all of the metal component 32 . In other words, the first antenna module 40 integrates the first radiator 43 into the metal component 32 and directly uses the metal component 32 to transmit and receive electromagnetic waves, thereby saving space for additionally arranging the first radiator 43 .

A radiation path L1 can be defined starting from the feed point 41, passing through the first radiator 43 (metal component 32) and ending at the first grounding point 42. The length of this radiation path L1 will affect its resonant mode (resonant frequency), and adjusting the distance between the feed point 41 and the first grounding point 42 (i.e., adjusting the position where the feed point 41 and the first grounding point 42 are connected to the metal component 32 on the carrier 31) can change the length of the radiation path L1 to obtain the desired resonant mode. Generally, the radiation path L1 can be adjusted by adjusting the size of the carrier 31 (for example, adjusting the extension position of the extension portion 312 relative to the main body 311). In this embodiment, the operating frequency of the first antenna module 40 can be 2300 to 2700 MHz (million Hertz).

In addition, the distance W between the side surface 3111 of the main body 311 and the side surface 101 of the circuit board 10 can also be adjusted to adjust the impedance matching of the first radiator 43. Preferably, the distance W can be adjusted between 0.5 and 5 mm to achieve the desired impedance matching.

The feeder 50 is used to transmit a first wireless signal (radio frequency energy) from the wireless communication chip 22 on the circuit board 10 to the first antenna module 40, and then the first antenna module 40 transmits electromagnetic waves according to the first wireless signal. Specifically, one end of the feeder 50 is electrically connected to the feeding point 41, and the other end of the feeder 50 is electrically connected to the circuit board 10, so as to be further electrically connected to the wireless communication chip 22. The first wireless signal is directly fed into the feeding point 41 and the first radiator 43 via the feeder 50, and then the first radiator 43 emits electromagnetic waves. Conversely, the first radiator 43 can also receive electromagnetic waves, and then transmit them to the wireless communication chip 22 via the feeding point 41, the feeder 50 and the circuit board 10. The feeder 50 can be a common form such as a cable line, a waveguide, etc.

As can be seen from the above description, the antenna device 1 in this embodiment integrates the first antenna module 40 with the functional element module 30, so that the metal component 32 of the functional element module 30 can be used to transmit and receive electromagnetic waves. In this way, the first antenna module 40 and the functional element module 30 can be accommodated in the same space, in other words, additional space can be saved to accommodate the other. In addition, when the metal component 32 is used to transmit and receive electromagnetic waves, the electromagnetic waves of the required frequency can be obtained by adjusting the radiation path L1.

It should be noted that, in addition to the electrical signals (such as audio signals) within the functional element module 30 itself, there are also wireless signals from the feeder 50, and the "metal component 32 used for the wireless signal" and the "metal line (another metal component) used for the power supply signal" can be isolated to reduce the interference between the wireless signal and the electrical signal.

The above is a description of the technical contents of the antenna device 1. Next, the technical contents of the antenna devices according to other embodiments of the present invention will be described. The technical contents of the antenna devices of each embodiment should be mutually referenced, so the same parts will be omitted or simplified.

Please refer to Figures 3A, 3B, 4 and 5, which are top and side views of an antenna device according to a second preferred embodiment of the present invention. Similar to the antenna device 1 (as shown in Figure 1A), the antenna device 2 may also include a circuit board 10, an electronic component 20, a functional component module 30, a first antenna module 40 and a feeder 50. The antenna device 2 further includes a second antenna module 60, which is used to transmit and receive another electromagnetic wave of a specific frequency.

Specifically, the second antenna module 60 is disposed above the carrier 31, and has a spacing H between the second antenna module 60 and the carrier 31. The second antenna module 60 has a second radiator 61 and a second grounding point 62, the second radiator 61 is a metal conductor (such as a metal sheet or a metal line), and the second grounding point 62 is disposed at one end of the second radiator 61. In addition, the second grounding point 62 is also electrically connected to the grounding layer 11 of the circuit board 10; if the distance between the second grounding point 62 and the circuit board 10 is large and cannot be directly connected, the second grounding point 62 can be electrically connected to the grounding layer 11 through a connector 63 of the second antenna module 60, and the connector 63 can include, for example, a spring, a transmission line, or a pin.

It should be noted that there is no feeding point on the second radiator 61 for the feeder 50 to be directly connected, and the second wireless signal (RF energy) transmitted by the feeder 50 is fed into the second radiator 61 by coupling. That is, the feeder 50 transmits the second wireless signal from the wireless communication chip 22 to the feeding point 41 of the first antenna module 40 and the first radiator 43, and then the second radiator 61 is excited to generate a specific resonance mode by the coupling effect, so as to emit electromagnetic waves of a specific frequency.

The resonant frequency of the second radiator 61 is related to its radiation path L2, and the radiation path L2 is related to the second grounding point 62 and the feeding point 41 below, so adjusting the positions of the second grounding point 62 and the feeding point 41 can change the length of the radiation path L2 to obtain the desired resonant mode. In this embodiment, the operating frequency of the second antenna module 60 can be 1805 to 2170 MHz. In addition, the spacing H between the second antenna module 60 (second radiator 61) and the carrier 31 can also be adjusted according to needs to change the impedance matching of the second antenna module 60. Preferably, the spacing H can be adjusted between 0.1 and 10 mm to achieve the desired impedance matching.

From the above description, it can be known that the antenna device 2 can provide at least two resonance modes by means of the first antenna module 40 and the second antenna module 60 . Each resonance mode includes multiple frequencies. Therefore, the antenna device 2 can meet the requirements of dual-mode and multi-frequency.

On the other hand, the antenna device 2 may further include a cover plate 70 (as shown in FIG. 5 ), which is disposed above the circuit board 10 and the carrier 31. The cover plate 70 may be the back cover of the electronic product, and includes a metal portion 71 and an insulating portion 72, and the metal portion 71 is located directly above the carrier 31. The second radiator 61 may include at least a portion of the metal portion 71 to save additional space for arranging the second radiator 61; in other words, the second antenna module 60 uses the metal portion 71 of the existing cover plate 70 as a radiator for transmitting and receiving electromagnetic waves.

It is also noted that the metal portion 71 cannot be too large than the required radiation path L2, otherwise it may make it difficult to adjust the radiation path L2 to the required value. In addition, if the cover 70 does not include a metal portion, the second radiator 61 can be a metal conductor buried in the cover 70, so the second radiator 61 will not occupy additional internal space of the electronic product.

Please refer to FIG. 6A, FIG. 6B and FIG. 7, which are top and side views of an antenna device according to a third preferred embodiment of the present invention. Similar to the antenna device 2 (as shown in FIG. 3A), the antenna device 3 may also include a circuit board 10, an electronic component 20, a functional component module 30, a first antenna module 40, a feed line 50 and a second antenna module 60. However, the first antenna module 40 of the antenna device 3 does not have a feed point 41 (as shown in FIG. 3A) for the feed line 50 to directly connect to, but the second antenna module 60 has a feed point 64, which is disposed at one end of the second radiator 61 and is located at opposite ends of the second radiator 61 from the second ground point 62. The feed line 50 is electrically connected to the feed point 64 of the second antenna module 60.

Thus, the first wireless signal from the wireless communication chip 22 is transmitted to the feeding point 64 and the second radiator 61 through the feeder 50, and then coupled to the first radiator 43, so that the first radiator 43 excites a resonant mode. The second wireless signal from the wireless communication chip 22 is transmitted to the feeding point 64 through the feeder 50 and fed into the second radiator 61, so that the second radiator 61 excites another resonant mode.

On the other hand, the second radiator 61 can be disposed on a bottom surface 73 of the cover 70 (as shown in FIG. 7 ) so that the distance between the second radiator 61 and the carrier 31 (first antenna module 40) is small, thereby adjusting the impedance matching of the first antenna module 40. In this case, the cover 70 may not include a metal part, and the second radiator 61 can be disposed on the bottom surface 73 by printing, pasting or fixing parts (such as rivets or bolts, etc.).

From the above description, it can be seen that antenna device 3, like antenna device 2, can also meet the requirements of dual-mode multi-frequency. In this way, antenna devices 2 and 3 are both suitable for applying carrier aggregation technology and can be used as polarization antennas. In an actual test example, antenna devices 2 and 3 are applied to a mobile phone with a size of 144.6mm by 69.7mm by 9.61mm, and the size of the functional component module 30 is 13mm by 18mm by 7mm, the spacing W is 1.5mm and the spacing H is 6mm. The relationship between the frequency (MHz) and the voltage standing wave ratio (VSWR) of antenna devices 2 and 3 is shown in Figure 8, and the relationship between the frequency (MHz) and the efficiency (%) of antenna devices 2 and 3 is shown in the following table.

frequency 1710.2 1755 1805.2 1850.2 1880 1909.8 1930.2 1960 1989.8 efficiency 9.54 9.01 12.31 17.84 19.79 20.42 23.17 25.38 24.01 frequency 2010 2025 2110 2140 2167.6 2300.8 2350 2399.2 2500 efficiency 20.83 20.02 22.08 19.82 19.26 24.24 28.87 30.34 35.96 frequency 2540 2580 2610 2650 2690 * * * * efficiency 34.06 37.11 40.41 48.08 46.53 * * * *

As can be seen from FIG. 8 and the table, in the intermediate frequency and high frequency bands of 1805 to 2700 MHz, the VSWR is less than 4.05, and the efficiency is greater than 12%, indicating that the antenna devices 2 and 3 have good VSWR and efficiency in these multiple frequencies, meeting the requirements of LTE (Long-Term Evolution) bands B3, B2, B1, B4, B25, B38, B39, B40, B41, B7 and WIFI2.4G.

In summary, the antenna device proposed in each embodiment of the present invention integrates the antenna module with the existing functional element module to save the space occupied by the antenna module and reduce the clearance area required by the antenna module. In addition, the antenna device also provides at least two resonance modes and multiple operating frequencies to meet the needs of today's wireless communications.

The above embodiments are only used to illustrate the implementation of the present invention and to explain the technical features of the present invention, and are not used to limit the protection scope of the present invention. Any changes or equivalent arrangements that can be easily completed by those familiar with this technology belong to the scope claimed by the present invention, and the scope of protection of the present invention shall be based on the scope of the patent application.

Claims (11)

1. An antenna device, comprising:

a circuit board including a ground layer;

The electronic components are arranged on the circuit board and comprise a microprocessor and a wireless communication chip;

The functional element module comprises a carrier plate and a metal member, wherein the carrier plate is provided with a main body part and an extension part, one side surface of the main body part is spaced from and faces one side surface of the circuit board, the extension part extends out from the side surface of the main body part, and is connected with the side surface of the circuit board and is electrically connected with the circuit board, so that electric signals can be transmitted between the functional element module and the circuit board and transmitted to the circuit board through the extension part;

The first antenna module is provided with a feed-in point, a first grounding point and a first radiator, wherein the feed-in point is arranged on the main body part, the first grounding point is arranged on the extension part, and the first radiator comprises at least one part of the metal component and is integrated into the metal component so as to directly utilize the metal component to receive and transmit electromagnetic waves; and

One end of the feeder line is electrically connected with the feed-in point, the other end of the feeder line is electrically connected with the wireless communication chip, and the feeder line is used for transmitting a first wireless signal to the feed-in point to feed in the first radiator, and the metal component enables the first wireless signal to be isolated from the electric signal so as to reduce interference between the wireless signal and the electric signal; thus, a radiation path is defined from the feed point through the first radiator to the first ground point.

2. The antenna device of claim 1, wherein the functional element module comprises an earphone module, a camera module, a speaker module, a vibration module, or a connector module.

3. The antenna device of claim 1, wherein a spacing between the side of the main body portion and the side of the circuit board is adjustable, the spacing being 0.5 to 5 millimeters.

4. The antenna device of claim 1, wherein the extension portion is integrally formed with the body portion.

5. The antenna device of claim 1, wherein the extension is integrally formed with the circuit board.

6. The antenna device of claim 1, wherein the operating frequency of the first antenna module is 2300 to 2700MHz.

7. The antenna device of claim 1, wherein the first antenna module and the functional element module are accommodated in a same space.

8. The antenna device of claim 1, wherein the metal member is disposed on the carrier, is a structure of a metal conductor on the carrier, and is distributed on the main body portion and the extension portion.

9. The antenna device of claim 8, wherein the metal member comprises a metal housing, a metal pin, a metal sheet, a metal line, a resistor, a capacitor, or an inductor.

10. The antenna device of claim 8, wherein the first grounding point and the feeding point are respectively located at two sides of the metal member, and the first grounding point is further electrically connected to the grounding layer of the circuit board.

11. The antenna device of claim 1, wherein the first radiator is also capable of receiving electromagnetic waves and transmitting the electromagnetic waves to the wireless communication chip through the feed point, the feed line and the circuit board.